The ferrite-silica aerogel nanocomposite prepared by a sol–gel process and a supercritical drying process was investigated from the point of view of new composite material. The ferrite nanoparticles were prepared by a coprecipitation method and added to tetramethylorthosilicate (TMOS) in the range of 0 to 20 mol %. The ferrite-silica wet gel was prepared from TMOS containing ferrite nanoparticles, ethanol, deionized water and NH₃ aq. as a catalyst, and replaced the liquid phase and aged in the ethanol. Then, a hydrophobing treatment was performed in hexamethyldisilazane toluene solution. Finally, the ferrite-silica wet gel was dried in the supercritical carbon dioxide fluid. The obtained ferrite-silica aerogel nanocomposite was evaluated by bulk density, porosity, specific surface area, pore size distribution, SEM and TEM observation, EDS analysis and magnetization measurement by VSM. As a result, even if it added the ferrite, the characteristics of aerogel was held and the magnetic property of the ferrite remained unchanged in the aerogel.